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NFourierTransform


gives a numerical approximation to the Fourier transform of expr evaluated at the numerical value , where expr is a function of t.
  • The numerical approximation to the Fourier transform of expr is by default defined to be NIntegrate[expr t, {t, -, }].
  • Different choices for the definition of the Fourier transform can be specified using the option FourierParameters.
Numerical Fourier transform for a box function:
Compare with the answer from symbolic evaluation:
Needs["FourierSeries`"]
Numerical Fourier transform for a box function:
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Compare with the answer from symbolic evaluation:
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